Automatic regulation of the forward and backward movement of the fabric in looms



Sept. 3, 1935. J. P. CAMPS 2,013,535

AUTOMATIC REGULATION OF THE FORWARD AND BACKWARD MOVEMENT OF THE FABRIC IN LOOMS Filed Sept. 3, 1932 3 Sheets-Sheet l J. P. CAMPS 2,013,535 AUTOMATIC REGULATION OF THE FORWARD AND BACKWARD Sept. 3, 1935.

MOVEMENT OF THE FABRIC IN LOOMS Filed Sept. 3, 1932 3 Sheets-Sheet 2 Sept. 3, 1935. J. P. CAMPS 2,013,535

AUTOMATIC REGULATION OF THE FORWARD AND BACKWARD MOVEMENT OF THE FABRIC IN LOOMS Filed Sept. 5, 1952 5 Sheets-Sheet 3 Patented Sept. 3, 1935 UNETE STTES AUTOMATIC REGULATION OF THE FOR- WARD AND BACKWARD MOVEMENT OF THE FABREG'IN LOOMS Juan Picaiiol Camps, Sabadell, Spain 2 Claims.

This invention relates to improvements in takeup movements for weaving looms.

It has been heretofore proposed to impart an intermittent rotationary movement to take-up rollers of weaving looms in one direction by means of a pawl and ratchet device or a free wheel device.

If in the course of the operation of the loom it is required for any reason to let back the takeup roller, it is necessary in the known devices to disengage the pawl and ratchet or free wheel mechanism, as normally they would prevent the take-up roller from being turned in the reverse direction. The disengagement of the normal take-up roller drive is a difficult and complicated operation in most constructions, and especially in the case of the more modern free wheel drives, where dismantling of certain parts and subsequent reassembling might become necessary before the normal operation of the loom can be resumed.

In addition, it is desirable that the take-up roller should not be freely rotatable upon the disengagement of the drive but that its let back motion should be positively controlled.

The present invention has for its object to provide an improved take-up movement for weaving looms, wherein the take-up roller can be rotated in a reverse direction in a positively controlled manner at any time without the necessity of interfering with the normal drive, so that the same can remain in engagement as usual while the take-up roller is rotated backwards.

With this object in View and according to the present invention there is provided a take-up movement for weaving looms wherein between the member intermittently driven by a rotating shaft of the loom through a pawl and ratchet or free wheel device and the take-up roller a differential gearing is interposed together with means to rotate said differential gearing bodily in a positively controlled manner in a direction that will produce the required let back movement of the take-up roller.

The invention is illustrated by way of example in the accompanying drawings.

Fig. l is a sectional side elevation of the improved take-up movement.

Fig. 2 is a front elevation partly in section, some of the parts being omitted.

Fig. 3 is a front elevation, mainly for illustrating the parts omitted in Fig. 2.

Fig. 4 shows a modification.

Referring to Figs. 1 to 3, the intermittent drive of the take-up roller l5 (Fig. '1) is derived from an axle 23 journalled at 34 in a cylindrical member 35.

The axle 23 is intermittently rotated by an eccentric 32 mounted on a cam shaft 33 (Fig. 3) which is rotated by the driving motor of the loom in any suitable manner. The eccentric 32 reciprocates a rod 24 the free end of which is secured in a head piece 25 rockably mounted on a pin 35 fixed to a nut 26 (Fig. 1) slidable in the rocker arm 28 and screwed on the threaded spindle 2'! which is rotatable in the rocker arm 28 by means of hand wheel 29 but is secured against longitudinal movement therein.

The rocker arm 28 is freely rotatable on the axle 23 and has an annular ledge 3i disposed concentrically thereto. Keyed to the axle 23 at 38 there is a drum 2 whereon the ledge 31 is snugly rotatable, the drum being about twice as wide as the ledge. In the periphery of drum 2 a number of recesses 39 (Fig. 3) are made housing a set of rollers l, the ledge 31, the drum 2 and the set of rollers l constituting a free wheel device which allows rotation of the drum and therewith of the axle 23 keyed thereto in the direction of the arrow in Fig. 3. A second set of rollers M3 is mounted in the recesses 39 at the remaining width of the drum cooperating with an annular ledge ll! of one part 4 of atwo part casing 4, ll housing a differential gearing which transmits the intermittent lrotationary movement of axle 23 to the take-up roller iii in a mannerhereinafter described. The object of this second set of rollers MI is to lock the drum 2 against unwanted reverse rotation when the rocker arm 28 is rocked opposite the arrow in Fig. 3. The two sets of rollers are separated by a ring 3 let into a suitable groove in drum 2.

The extent of the movement of rocker arm 28 and therewith that of rotation of the take-up roller I5 is adjusted in a well known manner by turning the hand wheel 29.

The differential gearing through which the intermittent rotation of axle 23 is transmitted to the take-up roller I5 is constructed in the example shown in the following manner:-

One part of the axle 23 is formed as a gear 42 (Figs. 1 and 2) meshing with pinions 22 loosely mounted on shafts 2| secured in a gearbox 5 (shaded in criss-cross lines in Fig. l) rotatably mounted in casing 4, H. The said pinions 22 are in mesh with pinions l mounted on shafts 6, secured in gearbox5. The said pinions l are in mesh with a gear 53 formed at one end of the cylindrical member 35, at the other end of which another gear mesh with a gear I! rotatably mounted on a shaft I6 fixed to part casing H. The extended hub of gear ll carries a pinion 44 in mesh with gear Ill mounted on shaft 8 of the takeup roller 15, the shaft 8 being journalled in part casing I. A claw clutch l2, l3 actuated by a lever 14 gpivoted on the frame 3| of the loomis interposed between the take-up roller l5 and its drive, so that the take-up roller can be completely cut off from its drive if desired.

i8 is formed. The latter is in The differential gearing just described has for its object, as already explained, to enable the take-up roller [5 to be rotated for let-back motion in the reverse direction, without the drive being in any way interfered with.

The mechanism by means of which a let-back motion is obtained in a; positively controlled normally kept in engagement with the ratchet 41 by springs, not shown. Pivotally attached to the upper end of rocker member Hi there is a link 9 to the free end of which is pivotally attached a threaded bolt 48 (Fig. 2) which passes through a hole in the loom frame 3| and has a rimmed nut 30, screwed thereon outside the frame, in such a manner that the nut 30 is applied to a corresponding boss on the frame and when turned causes the rocker member I9 to be rocked.

In the modification shown in Fig, 4 the ratchet teeth 20 on the periphery of gearbox 5 are omitted together with the rocker member l9 and its associated mechanism, and are replaced by a worm shaft 49 and worm 50 mounted in half casing II and co-operating with a worm wheel 5| secured to gearbox 5 and operated by a hand wheel 52 so that the gearbox 5 together with the pinion mounted therein may be turned in either direction, rotation in one direction effecting the reversal of the take-up roller l5 for let-back motion.

In operation, the free wheel drum 2 is intermittently rotated anticlockwise (Fig. 3) by eccentric 32 connecting rod 24 and rocker arm 28,

- whereby gear 42 is rotated anticlockwise, pinions 22 clockwise, pinions l anticlockwise, member 35 clockwise, gear ll'and pinion 4.4 anticlockwise, gear l and therewith take-up roller l clock- Wise.

If now it is desired to reverse the direction of rotation of the take-up roller l5 for let-back motion, the normal drive is stopped and gearbox 5 is turned by means of the nut 30 or hand wheel 5| clockwise whereby pinions I in being taken round therewith are rotated clockwise, member 35-the pinion 43 of which is in mesh therewithis rotated anticlockwise, gear I! and pinion 44 clockwise, gear l0 and therewith the takeup roller l5 anticlockwise, i. e. in a direction reversed to the usual drive.

It is understood that the construction described and illustrated by way of example is capable of various modifications in construction and arrangement without departing from the spirit of the invention, thus for example any other suitable type of differential gearing may be used and the free wheel drive may be replaced by a pawl and ratchet drive.

I claim:

' l. A device for regulating the forward and backward movement of fabric on looms, comprising in combination with the loom frame a driving shaft journalled in said frame, a cam on said shaft, a, connecting rod adapted to be reciprocated by said cam, an oscillatable lever connected atone end to said connecting rod and having a recess at its other end, a ring having wedge shaped recesses distributed around its i circumference and projecting partly with one half into the recess in said lever, a casing surrounding the other half of said ring, two sets of rollers in said wedge shaped recesses in said ring one set within the recess of said lever and adapted tojambetween said ring and said lever to cause said ring to rotate with said lever whenv same swings in one direction and to slide backinto said wedge shaped recesses to allow said lever to move independently of said disc in the other direction, the other set of rollerswithin said casing adapted to allow said ring to rotate with said lever in one direction and to jam' between said ring and said casing to lock said ring against rotation when said lever swings in the other direction, a pinion rigidly connected to and adapted to be rotated in one direction by said ring, a differential gearing cooperating with said pinion to transmit the movement of said ring, a fabric winding drum connected to said difierential gearing adapted to be driven in one direction by said gearing, a disc carrying said gearing, ratchet wheel on the periphery of said disc, a pawl engaging said ratchet wheel, and means for shifting said pawl to rotate said ratchet wheel to' turn said roller in the opposite; direction to that imparted by said ring through the intermediary of said gearing. 2. A device for regulating the forward an backward movement of fabric on looms, comprising in combination with the loom frame, a driving shaft journalled in said frame, a cam on said shaft, a, connecting rod adapted to be reciprocated by said cam, an oscillatable lever connected at one end to said connecting rod and having a recess at its other end, a ring having wedge shaped recesses distributed around its circumference and projecting partly with one half into the recess in said lever, a casing sur rounding the other half of said ring, two sets of rollers in said wedge shaped recesses in said ring one set within the recess of said lever and adapted to jam between said ring and said lever to cause said ring to rotate with said lever when same swings in one direction and to slide back into said wedge shaped recesses to allow said lever to move independently of said disc in the other direction, the other set of rollers within said casing adapted to allow said ring to rotate with said lever in one direction and to jam between said ring and said casing to lock said ring against rotation when said lever swings in the other direction, a pinion rigidly connected to and adapted to be rotated in one direction by said ring, a differential gearing cooperating with said pinion to transmit the movement of said ring, a fabric winding drum connected to said differential gearing adapted to be driven in one direction by said gearing, a disc carrying said gearing, a ratchet wheel on the periphery of said disc, a pawl engaging said ratchet wheel, a worm screw thread on the periphery of said disc, a worm engaging said worm screw thread, and means for rotating said worm to cause said disc parted by said ring through the intermediary of said gearing.

JUAN PIcAfioL CAlVLPS. 

